Effect of COVID-19 Pandemic upon People's Life Aspects: An Overview Study

Coronaviruses are a broad strain that includes a group of viruses which may cause a respiratory diseases ranging in severity from common colds to more severe diseases that lead to death. Recently in China, the emerging disease Covid-19 was discovered, which causes a range of symptoms such as fever, dry cough, fatigue, aches and pains, headaches, nasal congestion and loss of taste or smell. The new Corona disease (COVID-19) has forced the entire world to face one of the most difficult challenges in contemporary history, as this virus has infected millions and killed hundreds of thousands of people in various age groups. It is a grave mistake to describe this challenge as a health crisis only. It is a pandemic large-scale humanitarian crisis that is leading to the misery and suffering of all humankind and pushing its social and economic well-being to the brink of collaps

In vitro evaluation of the antioxidant, anti-Propioni bacterium acne and antityrosinase effects of Equisetum ramosissimum (Jordanian horsetail)

Purpose: The investigation of Equisetum ramosissimum Desf. (Equisetaceae) extracts for total phenolic content, potential antioxidant properties, and antibacterial activity against Propioni bacterium acne and antityrosinase effects.Methods: The aerial parts of the E. ramosissimum from Jordan were extracted by maceration and Soxhlet methods, using solvents of different polarities. The composition of the extracts were qualitatively screened using standard phytochemical tests. Quantitatively, total phenolic content (mg/mL, equivalent to gallic acid), ABTS free radical scavenging activity (IC50), anti-P. acne (MIC and MBC), and tyrosinase inhibitory effects (IC50) were also determined.Results: The aqueous-methanol Soxhlet extract contained the highest total phenolic content (0.675 mg/mL gallic acid equivalents). Besides, phytochemical screening tests revealed the presence of phenols, flavonoids, tannins, alkaloids and saponins in the aqueous methanol Soxhlet extract, contributing to the antioxidant (IC50 = 0.125) and antityrosinase (IC50 = 1.125) effects. This extract also showed potent antimicrobial effects against P. acne (MIC = 6.250 mg/mL; MBC = 12.500 mg/mL). Other extracts, including ethanol, water and ethyl acetate, showed lower total phenolic content with moderate and weak biological activity.Conclusion: E. ramosissimum is a promising plant species to be considered for antioxidant, antiacne, and antityrosinase effects. However, further testing (including invivo, histological examination, and highperformance liquid chromatography (HPLC) analysis) is necessary to understand more about its mechanisms of action. Keywords: Antioxidant, Anti-Propioni bacterium acne, Antityrosinase, Equisetum ramosissimum, Total phenolic content, Jordanian horsetai

Removal of Cobalt (Co(II)) from Aqueous Solution by Amino Functionalized SBA-15

Mesoporous silica SBA-15 material was synthesized and functionalized by post synthesis method with amino functional group (3-aminopropyltriethoxysilane) to investigate its potential use as an adsorbent for cobalt (Co(II)) removal from aqueous solution. Several characterization methods were used for identifying the material characteristics before and after functionalization, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Batch adsorption experiments were conducted and different variables that affected the removal of cobalt ions were studied, such as pH (1-6), contact time (0-150min), initial concentration (20-120mg/L) and adsorbent dose (0.025-0.3g). It was found that amino functional group was very effective in increasing the percentage removal of (Co(II)) as compared with non-functionalized SBA-15. The percentage removal of these ions were increased with the increasing of pH (up to 5), contact time and NH2-SBA-15 dose, while the increase of the initial concentration of Co(II) ions led to decrease in it

Numerical study on the turbulent mixed convective heat transfer over 2D microscale backward-facing step

The current numerical study investigated over two-dimensional (2D) flat microscale backward-facing step (MBFS). The boundary conditions and the controls fixed by the finite volume method (FVM) and RNG k-ε model. The upstream and the step of the wall considered adiabatic, while the downstream of the wall heated by constant heat flux. The straightforward wall of the channel fixed at a constant temperature that is higher than the fluid inlet temperature. The Reynolds number (Re) range of 5,000 ≤ Re ≤ 15,000 was used in the study. The results show that the increase in the Re will resulted in increased of Nusselt number (Nu). The study also found that the highest Nu was produced from the ethylene glycol case. The current study also found that the recirculating range at steps is more significant than using water under the same Re by using ethylene glycol

The effect of the ectoparasite (Pediculus humanus capitis) on immunological and blood parameters in children of different ages in Baquba city

Background: Ectoparasites are predominant parasitic infections among children. Head lice (Pediculus humanus capitis) are transmitted parasites, mainly among school-aged children. Although, head lice are not a chief health hazardor or a vector for disease, they are a public social problem. The transmitted infections by a parasitic bite, may reach the blood which causes health problems for children and affects their health. Objective: To investigate the effects of infection with head lice on Immunoglobulin E (IgE), vitamin D3, Zinc, and blood parameters. Patients and Methods: Samples including skin swapping and blood samples were collected from 300 children who were examined at AL-Batool Maternity Teaching Hospital (AL-BMTH) and some medical centers. Skin scraping and swapping were examined microscopically for detection of the parasite. Blood samples were analyzed for immunological and blood parameter estimation, during the period from 1st October 2021 to the end of May 2022. Samples were sent to the parasitology and hematology laboratories in AL-BMTH to identify the parasitic infections and their effects. Results: The samples include 180 females and 120 males, 90 samples  of the 300 were epidemic with lice infection, 48.9% of them were at age 1-5 years, 35.6% were at age 6-10 and 15.6 % were at age 11-15,  91% of the infected children were females, while only 9 % of the infected children were males. The blood analysis indicated that the levels of vitamin D and the mineral Zinc, were lower in children infected with head lice compared to the control, while IgE was higher. RBC and Hb showed a lower level in infected children than in control, whereas WBC was at a high ratio in most patients. Conclusion: Parasites cause many diseases in children in particular. They spread in rural and crowded places and affect the activity and vitality of children

HYDROCHEMICAL ASSESSMENT OF THE FEED WATER IN THE WESTERN PART OF HUWAIZA MARSH, MAISSAN GOVERNORATE, SOUTH OF IRAQ

The aim of this study is to evaluate the hydrochemistry of the western part of Huwaiza Marsh, in Maissan Governorate; southern Iraq. This study was conducted during April to August 2013, where 13 stations have been selected: four stations represent the feed water and nine stations located in the western part of Huwaiza Marsh. The total dissolved solids (TDS) range from (1175 to 1387) mg/L and from (1594 to 2481) mg/L for the feed water and Huwaiza Marsh water, respectively. Electrical conductivity (EC) values for the feed water and Huwaiza Marsh range from (1782 to 2400) μs/cm for the former and from (2630 to 3517) μs/cm for the later. The pH values range from (7.7 to 8.2) for the feed water and from (7.4 to 7.5) for the Huwaiza Marsh water. The results of chemicals analysis of dissolved cations and anions (Ca2+, Mg2+, Na+, K+, Cl-, SO42-, HCO3- and NO3-) showed different values, and the concentration is decreasing during winter season, because of the high water levels, and increasing during the summer season due to low water levels. The marsh water is unsuitable for human drinking, because most of the variable’s rates exceeded the permissible limits and they are acceptable grade for livestock and poultry

Hybrid nanofluid flow and heat transfer over backward and forward steps: a review

This work describes the recent progress in the improvement of heat transfer through microscale facing steps. This analysis includes previous studies that aimed to improve heat transfer with and without hybrid nanofluids. This review presents the experimental and numerical results on the usage of hybrid nanofluids. Furthermore, this work introduces the use of backward-facing step (BFS), forward-facing step (FFS) and microscale steps with different flow regimes and working fluids. This study reveals an increase in heat transfer by utilizing hybrid nanofluids as a working fluid and an improvement in the coefficient of heat transfer when the nanoparticle volumes and concentrations of hybrid nanofluids increase. This work points out the studies on hybrid nanofluids over BFS and FFS, describes various nanoparticles used on the basis of thermal conductivity and shows the improvement in the rate of heat transfer. This study also outlines the discussion and future direction of the current review

Experimental Study of 2-Amino-5-(4- nitrophenyl)-1, 3, 4-Thiadiazole for MS in HCl Solution

The present work aims to study the inhibition performance of new organic inhibitor namely ANTD “2-amino-5-(4-nitrophenyl)-1,3,4- thiadiazole” on corrosion of mild steel (MS) in HCl environment at the concentration of 1.0 M through using weight loss techniques. Weight lost measurements demonstrates the presence of a film on MS surface in existence of organic substance. The inhibition performance of ANTD at various concentrations for mild steel increases with increasing concentration and with an increased in the immersion time and decreased with raising temperatures degrees. The optimal inhibition efficiency of (ANTD), 82%, was achieved for mild steel when immersed with the highest utilized concentration for 6 hrs

COVID-19 denial in Turkmenistan veiling the real situation.

Coronavirus disease 2019 (COVID-19) emerged in late 2019, with the first case identified in Wuhan City, Hubei Province, China, on 12 December 2019. In order to perceive the comprehensive impact of this pandemic, we have to know that misinformation and denials about COVID-19 have surely exacerbated its diffusion and hindered the response against it. Turkmenistan remains one of the very few countries in the world that lacks reports about emerging cases of the novel coronavirus. Turkmen authorities claim that they have adopted all attainable measures required in order to combat the virus, asserting that COVID-19 has yet to reach their country. Despite the government's reported absence of COVID-19 in the country, rumors, media reports and independent sources suggest the spread of the pandemic in Turkmenistan. By mid-June 2020, the outbreak was referred to as being serious with patients suffering extreme health risks, and following its state of disrepair and unethical practices, many of those anticipated to be COVID-19 infected tend to suffer at home, discouraging any interaction with the healthcare system. The civil society in Turkmenistan, for the time being, takes full part of the government's duty in the process of informing and educating the public regarding the COVID-19 pandemic, and endeavors to keep the government and WHO accountable for behaving in such repressive ways that could lead to rather preventable loss of human life in Turkmenistan. Yet, efforts hang fire before unveiling the real situation, and Turkmenistan's government owning up to the negations and roaming speculations, not only regarding the coronavirus crisis, but every public-related issue itself

Sustainable hydrogen energy in aviation-A narrative review

In the modern world, zero-carbon society has become a new buzzword of the era. Many projects have been initiated to develop alternatives not only to the environmental crisis but also to the shortage of fossil fuels. With successful projects in automobile technology, hydrogen fuel is now being tested and utilized as a sustainable green fuel in the aviation sector which will lead to zero carbon emission in the future. From the mid-20th century to the early 21st numerous countries and companies have funded multimillion projects to develop hydrogen-fueled aircraft. Empirical data show positive results for various projects. Consequently, large companies are investing in various innovations undertaken by researchers under their supervision. Over time, the efficiency of hydrogen-fueled aircraft has improved but the lack of refueling stations, large production cost, and consolidated carbon market share have impeded the path of hydrogen fuel being commercialized. In addition, the Unmanned Aerial Vehicle (UAV) is another important element of the Aviation industry, Hydrogen started to be commonly used as an alternative fuel for heavy-duty drones using fuel cell technology. The purpose of this paper is to provide an overview of the chronological development of hydrogen-powered aircraft technology and potential aviation applications for hydrogen and fuel cell technology. Furthermore, the major barriers to widespread adoption of hydrogen technology in aviation are identified, as are future research opportunities